• The Journal of the Korea Contents Association
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• v.11 no.6
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• pp.59-66
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• 2011

Resource constrained project scheduling problem with multiple resource constraints as well as precedence constraints is well-known as one of the NP-hard problem. Since these problems can't be solved by the deterministic method during reasonable time, the heuristics are generally used for getting a sub-optimal during reasonable time. In this paper, we introduce an efficient genetic algorithm for resource constrained project scheduling problem using crossover which is applying schema theory and real world tournament selection strategy. Experimental results showed that the proposed algorithm is superior to conventional algorithm.

• Journal of Communications and Networks
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• v.13 no.6
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• pp.633-638
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• 2011

In this paper, we consider resource allocation with proportional fairness in the downlink orthogonal frequency division multiple access relay networks, in which relay nodes operate in decode-and-forward mode. A joint optimization problem is formulated for relay selection, subcarrier assignment and power allocation. Since the formulated primal problem is nondeterministic polynomial time-complete, we make continuous relaxation and solve the dual problem by Lagrangian dual decomposition method. A near-optimal solution is obtained using Karush-Kuhn-Tucker conditions. Simulation results show that the proposed algorithm provides superior system throughput and much better fairness among users comparing with a heuristic algorithm.

• The Journal of Economics, Marketing and Management
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• v.9 no.4
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• pp.19-30
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• 2021

Purpose: This study aimed to examine how a superior employee's ethical leadership affects members' innovative behaviors, mainly on organization-based self-esteem. It also aimed to verify the mediating effect of organization-based self-esteem in the process that ethical leadership affects members' innovative behavior in distribution-related organizations. Research design, data and methodology: After collecting materials from companies' executives and staff members in distribution-related organizations located in Seoul, South Korea, a research hypothesis was analyzed. Results: A superior employee's ethical leadership affects a positive (+) effect on innovative behaviors of the organization's members and the study confirmed that the relation of this effect was mediated by organization-based self-esteem. It means that the possibility that an organization's members will do innovative behaviors will be increased if a leader conducts ethical leadership. It also means that a leader with ethical leadership enables an organization's members to pay attention all the time and be awake for their work environment. Conclusions: The result of this study discusses how ethical leadership affects innovative behaviors of an organization's members from the perspective of organization-based self-esteem and has a theoretical implication that it has empirically examined it. More importantly, it has a theoretical implication because it verified how this effect was made using organization-based selfesteem and flexible human resource management.

• Journal of Digital Convergence
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• v.11 no.12
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• pp.145-154
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• 2013

This research draws the factors of managerial performance that was verified by research model and hypothesis after considering research type, factors of performance and research model. The result of this research is as below. Firstly, psychological traits, capabilities of CEO is positively correlated with cost superior tactic and organizational effectiveness Secondly, entrepreneurial capability of CEO is positively correlated with organizational effectiveness for and managerial capability of CEO is positively correlated with cost superior tactic and technical capability of CEO is positively correlated with organizational effectiveness. Thirdly, technical resource is positively correlated with product innovation differentiation tactic, and organizational effectiveness and finance resource is positively correlated with marketing differentiation tactic and organizational effectiveness, and marketing capability is positively correlated with product differentiation tactic, marketing. Fourthly, product innovation-differentiation tactic, marketing differentiation tactic, and cost superior tactic are positively correlated with organizational effectiveness.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.53 no.1
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• pp.75-84
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• 2008

Colored potatoes are an excellent source of dietary polyphenols including anthocyanins. Generally, anthocyanins from fruits and vegetables exhibit anti-carcinogenesis and anti-cancer properties in vitro test. This experiment was conducted to know the effects of colored potato extracts contained anthocyanins on antimutagenic activity and anticancer activity to six human cancer cell lines containing LNCaP (androgen-dependent) prostate cancer cells. Extracts of three colored potatoes ('Hongyoung', 'Jayoung' and 'Jasim') and the white potato ('Superior') cultivars were used in this study. The extracts of three colored potatoes inhibited the mutagenicities induced by direct mutagen such as 4-nitro-quinoline-1-oxide (4-NQO) and another indirect mutagens of bezo(a)pyrene (BaP). Also, the extracts of 'Hoyoung' and 'Jayoung' showed higher antimutagenic activity than 'Jasim' and 'Superior' against to direct or indirect mutagen on both strains of TA98 and TA100. The activity of growth-inhibitory of extract of four potato cultivars were screened by SRB (sulphorhodamine B) method on diverse human cancer cells representing different types of cancers. Among the extract of four potato cultivars, the extract of 'Jasim' showed moderate inhibition on proliferation of LNCaP, ACHN and MOLT-4F cells and did not inhibit the proliferation of other cancer cells. On the other hand, extract of 'Superior' did not inhibit the proliferation of any tested cancer cell lines. However, the extracts of 'Hongyoung and Jayoung' inhibited the proliferation of cancer cells with $GI_{50}$ values ranging from 2.5 to $30\;{\mu}g/mL$. On the basis of the $GI_{50}$ values, it is clear that LNCaP cells were more sensitive to extracts of colored potato cultivars than other cancer cells. The extract of 'Jayoung' at $30\;{\mu}g/mL$ were more active and inhibited cell proliferation, and induced apoptosis in LNCaP cells. This result revealed that the extracts of colored potatoes are expected to be good candidate for development into source of antimutagenic and anticancer agent.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.10
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• pp.2382-2388
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• 2014

To provide network reliability in indoor wireless communication systems, we should resolve the problem of unexpected network failure rapidly. In this paper, we propose an adaptive resource management (ARM) scheme to support seamless connectivity to users. In consideration of system throughput and user fairness simultaneously, the ARM scheme adaptively determines the set of healing channels, and performs scheduling and power allocation iteratively based on a constrained non-convex optimization technique. Through intensive simulations, we demonstrate the superior performance results of the proposed ARM scheme in terms of the average cell capacity and user fairness.

• Journal of Information Processing Systems
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• v.18 no.3
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• pp.443-456
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• 2022

An efficient and reasonable resource allocation strategy can greatly improve the service quality of Internet of Vehicles (IoV). However, most of the current allocation methods have overestimation problem, and it is difficult to provide high-performance IoV network services. To solve this problem, this paper proposes a network resource allocation strategy based on deep learning network model DDQN. Firstly, the method implements the refined modeling of IoV model, including communication model, user layer computing model, edge layer offloading model, mobile model, etc., similar to the actual complex IoV application scenario. Then, the DDQN network model is used to calculate and solve the mathematical model of resource allocation. By decoupling the selection of target Q value action and the calculation of target Q value, the phenomenon of overestimation is avoided. It can provide higher-quality network services and ensure superior computing and processing performance in actual complex scenarios. Finally, simulation results show that the proposed method can maintain the network delay within 65 ms and show excellent network performance in high concurrency and complex scenes with task data volume of 500 kbits.

• Food Science and Preservation
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• v.30 no.1
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• pp.65-77
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• 2023

In this study, we investigated the immunological properties of six strains of Acetobacter pasteurianus through nuclear factor-kappa B/activator protein-1 (NF-κB/AP-1) transcription factor activation and nitric oxide (NO) and cytokine production in macrophages. We found that the six A. pasteurianus strains had no significant inhibitory effect on the cell viability of RAW-Blue^TM cells at the concentration of (25, 50, 100 CFU/macrophage). The production of NO and cytokines (TNF-α, IL-1β, and IL-6) showed different abilities of immune activation for each strain, and it was 0.7 to 0.9 times higher than that of the LPS (100 ng/mL, v/v) positive control and 7 to 8 times superior to that of the negative control group. To explore the underlying mechanism, we evaluated the mRNA expression of pro-inflammatory genes. Consequently, we found that inducible nitric oxide synthase (iNOS) and cyclooxygenase (COX)-2 expression including genes expression of cytokines were elevated by the six A. pasteurianus treatment. These results suggested that the six strains of A. pasteurianus have an excellent industrial application value as a functional material for the purpose of enhancing immune function.

• Korea Journal of Hospital Management
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• v.9 no.1
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• pp.95-114
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• 2004

The purpose of this study was to identify the relationship between organizational culture based on the competing values approach, human resource management practices and organizational performance at a hospital. Participants were 138 employee in a general hospital. Data were collected during May, 2003 using four structured instruments. The data were analyzed using Chi-square test, One-way ANOVA, $scheff{\acute{e}}$ test and Cluster analysis. Three clusters were derived from cluster analysis. The first cluster consisted of cultures which were mixed developmental, consensual, hierarchial and rational culture equivalently. The second cluster consisted of the weak cultures, which was lower score than other clusters. The third cluster consisted of strong comprehensive cultures, which had higher score than other clusters. In the three clusters, hierarchial and rational culture were superior. The difference between human resource management practices and organizational commitment in organizational performance according to organizational culture clusters was found to be statistically significant. The cluster which had strong comprehensive cultures, in contrast to other clusters, more significantly affects on human resource management practices and organizational commitment. However, the strength of organizational culture does not have a significant effect on customer oriented service performance in organizational performance. These results showed that types of organizational culture were significantly related to human resource management practices and organizational commitment, and understanding the existing culture is essential to develop the organization of hospitals.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.8 no.1
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• pp.82-91
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• 2009

Routing (or path selection) is one of the key issues of multi-hop relay networks such as the IEEE 802.16j. Moreover, the allocation of appropriate resource such as bandwidth should not only be made in accordance with the paths selected, but the utilization of radio resource of an entire cell should also be maximized. Due to this interdependency between the problems of resource allocation and routing, it is desired these two problems are addressed simultaneously. In this paper, we propose a joint resource allocation and routing scheme for an OFDMA-based multi-hop cellular system. This scheme uses a polynomial time heuristic algorithm called Multi-Dimensional Multi-choice Knapsack Problem (MMKP) in order to find an approximate solution maximizing the total downlink throughput. In the simulation results, we show that the proposed scheme finds a sub-optimal solution which is superior to a link quality-based routing scheme, but slightly worse than the optimal solution.